The 5.2 Builds are failing with the latest ransack version.

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ransack - 2.6.0 - 2022-03-08

• Drop support for ActiveRecord older than 6.0.4. PR Drop rails 5.2 support activerecord-hackery/ransack#1276

https://github.com/activerecord-hackery/ransack/blob/master/CHANGELOG.md

Solution 1: Fix the version of ransack
Solution 2: Drop support for ActiveRecord older than 6.0.

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I think the 1.4.4 version of baby_squeel for Rails 5.2 is stable and does not need any more fixes for the Rails 5.2.
So we could make a 1.5 only for Rails 6.0 and above #122

@rzane ransack did it in a patch version. What do you think?